Laser Verification Apparatus for Radiotherapy Collimator Calibration
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Solution Overview
Problem
Current radiation therapy devices require complex and costly calibration processes to ensure precise positioning and accuracy, which are time-consuming and inefficient.
Innovation Solution
A laser verification apparatus for multi-source radiotherapeutic devices, featuring a positioning plate, movable plate with alternating mounting holes, laser emitters, and an acquisition analyzer, allows for the verification and calibration of collimator accuracy and radiation field shape without active radioactive sources, enabling precise calibration and visualization of the radiation field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional calibration methods using radioactive sources are employed, then measurement accuracy of radiation field can be ensured, but operation time increases and cost rises
Solution Approach 1:
The patent uses laser beams to create an optical copy of the radiation field path. The laser verification apparatus emits laser beams that travel through the same collimator holes as radiation would, allowing calibration of the radiation field geometry without using actual radioactive sources. This copying approach maintains measurement accuracy while eliminating the time-consuming and costly radioactive source calibration process.
Solution Approach 2:
The patent introduces laser beams as an intermediary substance to verify the radiation field. Instead of directly using radioactive sources for calibration, the laser serves as a safe mediator that can be detected by the acquisition analyzer to determine the radiation field shape and position, thereby reducing calibration time and cost while maintaining precision.
2Measurement precision
If radioactive sources are used for calibration, then radiation field verification is possible, but radiation safety risks increase
Solution Approach 1:
The patent replaces radioactive sources with laser beams that replicate the path and geometry of radiation without carrying the harmful properties. The laser verification apparatus creates an optical model of the radiation field that can be safely detected and measured, eliminating radiation exposure risks while maintaining verification capability.
Solution Approach 2:
The patent converts the potentially harmful radiation field into a safe laser optical field for verification purposes. By using laser beams that follow the same path as radiation through the collimator, the system transforms a harmful verification method into a safe one, allowing radiation field verification without radiation exposure to operators.
3Manufacturing precision
If complex calibration procedures are followed, then device accuracy is ensured, but device complexity increases
Solution Approach 1:
The patent uses laser beams to copy the radiation field path through the collimator holes, creating a simplified optical model that can be easily detected and measured. This copying approach replaces complex radioactive source calibration procedures with a simpler laser-based system that maintains device accuracy while reducing procedural complexity.
Solution Approach 2:
The patent replaces the mechanical and radioactive calibration system with an optical laser-based system. The laser verification apparatus uses light beams instead of physical radioactive sources and complex mechanical positioning, simplifying the calibration process while maintaining the precision needed for device accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate calibration and verification of the radiation field and focal point without radiation, reducing operational time and costs by automating the calibration process and allowing for direct observation and adjustment of the radiation field shape and position.
Implementation Method 1
a plurality of laser emitters, respectively received in the second mounting holes
Data Source
AI summary
The present disclosure discloses a laser verification apparatus employed in a radiotherapeutic device which comprises a plurality of radioactive sources, a collimator comprising a plurality of collimating holes, and a couch. The radioactive sources are capable of aligning in respect to the collimating holes respectively. The laser verification apparatus comprises: a positioning plate, fixed on the multi-source radiotherapy equipment and arranged between the radiation sources and the collimators; a movable plate, arranged on and movable relative to the positioning plate, and provided with a plurality of first mounting holes and a plurality of second mounting holes, which are arranged one by one, alternately, the movable plate is configured to switch the plurality of first mounting holes or the plurality of second mounting holes to positions corresponding to the plurality of collimators; a plurality of laser emitters respectively received in the second mounting holes, and an acquisition analyzer arranged on the couch and configured to acquire the light beams emitted by the laser emitters and perform data analysis.